Display screen with a transitional graphical user interface



FIG. 1 is a front view of a first image of a display screen with a transitional graphical user interface according to a first embodiment;

FIG. 2 is a front view of a second image thereof;

FIG. 3 is a front view of a first image of a display screen with a transitional graphical user interface according to a second embodiment; and,

FIG. 4 is a front view of a second image thereof.

The broken lines shown in the drawings form no part of the claimed design. The appearance of the image transitions sequentially between the images shown in FIGS. 1-2 and FIGS. 3-4. The process or period in which an image transitions to another forms no part of the claimed design. 

CLAIM The ornamental design for a display screen with a transitional graphical user interface, as shown and described. 